My friend talks to me about a new Forza racket more weight (140gr. maybe) to training. Some good players prefere it and not common Squash racket. Do you know some website that sell it?
I know that Central Sports sell a lot of Forza stuff, so you might find it on their website. http://www.centralsports.co.uk Hope this helps.
Kason does cater some racquets of such purpose and it comes in 2 different weight. The heaviest would be 160grm. For starters, any low end racquet would do just fine. Its heavy enough and the low string tension forces you to generate more power. Or even those old t-framed high end racquets would do just fine. They handle higher tensions better and they're cheaper too.
it's not really 140gr. chech the following link: http://www.transocean-sport.dk/category.128.article.938